M23 crash shuts northbound lanes near Gatwick Airport for six hours
Five vehicles involved in collision near junction 9a, with recovery expected to last until late evening
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A multi-vehicle crash on the M23 northbound near Gatwick Airport forced the closure of all lanes for six hours on 12 September. The collision occurred at approximately 14:30 near junction 9a, according to National Highways. Five vehicles were involved, though no serious injuries were reported.
National Highways confirmed the incident via social media at 15:05, stating that all lanes were blocked and advising drivers to avoid the area. Traffic was diverted onto the A23, with delays of up to 90 minutes expected. Recovery operations began shortly after emergency services arrived at the scene.
M23 and A13 closed after separate multi-vehicle crashes near London airports
National Highways confirmed closures on both routes, with diversions in place for drivers
Impact on local traffic and travel
The closure affected drivers travelling northbound towards London, as well as those accessing Gatwick Airport. National Highways urged motorists to use alternative routes or delay non-essential journeys. The A23 and surrounding local roads experienced increased congestion as a result of the diversion.
By 18:45, National Highways reported that two lanes had reopened, though delays persisted. Full reopening of all lanes was confirmed at 20:30, with recovery vehicles remaining on site to clear debris. The cause of the collision remains unclear, and National Highways has not yet released further details.
A23 crash near Brixton closes road and causes heavy traffic
Transport for London diverts vehicles after collision on 3 August 2026
What happens next
National Highways will continue to investigate the cause of the collision. Drivers who witnessed the incident are encouraged to submit dashcam footage via the National Highways website. No further closures are expected, but motorists are advised to check traffic updates before travelling.
Questions this report answers
+How long were the M23 lanes closed after the crash?
All lanes on the M23 northbound near junction 9a were closed for six hours, from 14:30 until 20:30 on 12 September. Delays of up to 90 minutes were reported during this period.
+Were there any serious injuries in the M23 crash?
National Highways confirmed that no serious injuries were reported following the multi-vehicle collision on 12 September. Emergency services attended the scene, but details of minor injuries remain unclear.
+What should drivers do if travelling near Gatwick Airport now?
Drivers should check National Highways traffic updates before travelling, as recovery operations may cause residual delays. Alternative routes, such as the A23, were recommended during the closure.
+Who is investigating the cause of the M23 crash?
National Highways is responsible for investigating the collision. Witnesses with dashcam footage are asked to submit it via the National Highways website to assist the inquiry.
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